Sintered Planchet question

Kore · April 29, 2005 6:21AM

Would this be considered a common error. I have about 6 of these at varying degrees on darkend 2005 bisons taken from shrink wrap rolls from the fed. res. A couple almost look like tarnished copper. I noticed this one on ebay, it had been slabed: Mint Error MS65 On Sintered Planchet by NGC.
Just wondering if they are worth the fees of the slab.

Thanks,
/Kore

wjd283 · April 29, 2005 6:25AM

I've never heard of it.

It is interesting but I doubt if it will be in big demand.

Kore · April 29, 2005 6:31AM

I didn't know what it was but as I searched for info on lamination errors I came across sintered. Which really matches what the coins look like that I have. You can spot the dark ones through the translucent shrink wrap but still hard to tell. I searched a whole unopened box.

/Kore

TUMUSS · April 29, 2005 6:33AM

Sintered: "To form a coherent mass by heating without melting"

Kore · April 29, 2005 6:38AM

<< <i>Sintered: "To form a coherent mass by heating without melting"

>>

Oh no! A mint AT.

/Kore

GDJMSP · April 29, 2005 6:59AM

It happens when copper dust collects on a planchet during annealing. This cause the planchet to become dark from the burnt copper dust.

Sintered Planchet question

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